<template>
  <div class="component-upload-video">
    <el-upload
      ref="videoUploadRef"
      multiple
      :action="uploadVideoUrl"
      list-type="text"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :before-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handleVideoCardPreview"
    >
      <el-button type="primary">选取视频</el-button>
    </el-upload>

    <div v-if="showTip" class="el-upload__tip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join('/') }}</b>
      </template>
      的文件
    </div>
  </div>
</template>

<script setup name="VideoUpload">
  import { ref, computed, watch, defineEmits } from 'vue';
  import { getToken } from '@/utils/auth';
  import { openWindow } from '@/utils/base';
  import modal from '@/plugins/modal';

  const props = defineProps({
    modelValue: [String, Object, Array],
    limit: {
      type: Number,
      default: 5,
    },
    fileSize: {
      type: Number,
      default: 100,
    },
    fileType: {
      type: Array,
      default: () => [
        'wmv',
        'asf',
        'asx',
        'rm',
        'rmvb',
        'mp4',
        '3gp',
        'mov',
        'm4v',
        'avi',
        'dat',
        'mkv',
        'flv',
        'vob',
      ],
    },
    isShowTip: {
      type: Boolean,
      default: true,
    },
  });

  const emit = defineEmits(['update:modelValue']);

  const videoUploadRef = ref(null);
  const number = ref(0);
  const uploadList = ref([]);
  const baseUrl = import.meta.env.VITE_APP_BASE_API;
  const uploadVideoUrl = ref(baseUrl + '/web/common/upload');
  const headers = ref({ Authorization: 'Bearer ' + getToken() });
  const fileList = ref([]);
  const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize));

  watch(
    () => props.modelValue,
    (val) => {
      if (val) {
        const list = Array.isArray(val) ? val : props.modelValue.split(',');
        fileList.value = list.map((item) => {
          if (typeof item === 'string') {
            item = {
              name: getFileName(item),
              src: baseUrl + item,
              url: baseUrl + item + `?accessToken=${getToken()}`,
            };
          }
          return item;
        });
      } else {
        fileList.value = [];
        return [];
      }
    },
    { deep: true, immediate: true },
  );

  function handleBeforeUpload(file) {
    if (props.fileType.length) {
      const fileName = file.name.split('.');
      const fileExt = fileName[fileName.length - 1];
      const isTypeOk = props.fileType.indexOf(fileExt) >= 0;
      if (!isTypeOk) {
        modal.msgError(`文件格式不正确, 请上传${props.fileType.join('/')}格式文件!`);
        return false;
      }
    }
    if (props.fileSize) {
      const isLt = file.size / 1024 / 1024 < props.fileSize;
      if (!isLt) {
        modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
        return false;
      }
    }
    modal.loading('正在上传文件，请稍候...');
    number.value++;
    return true;
  }

  function handleExceed() {
    modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
  }

  function handleUploadSuccess(res, file) {
    if (res.code === 200) {
      uploadList.value.push({
        name: getFileName(res.fileName),
        src: res.fileName,
        url: res.fileName + `?accessToken=${getToken()}`,
      });
      uploadedSuccessfully();
    } else {
      number.value--;
      modal.closeLoading();
      modal.msgError(res.msg);
      videoUploadRef.value?.handleRemove(file);
      uploadedSuccessfully();
    }
  }

  function handleDelete(file) {
    const findex = fileList.value.map((f) => f.name).indexOf(file.name);
    if (findex > -1 && uploadList.value.length === number.value) {
      fileList.value.splice(findex, 1);
      emit('update:modelValue', listToString(fileList.value));
      return false;
    }
  }

  function uploadedSuccessfully() {
    if (number.value > 0 && uploadList.value.length === number.value) {
      fileList.value = fileList.value.filter((f) => f.url !== undefined).concat(uploadList.value);
      uploadList.value = [];
      number.value = 0;
      emit('update:modelValue', listToString(fileList.value));
      modal.closeLoading();
    }
  }

  function handleUploadError() {
    modal.msgError('上传文件失败');
    modal.closeLoading();
  }

  function handleVideoCardPreview(file) {
    openWindow(file.url);
  }

  function getFileName(name) {
    if (name.lastIndexOf('/') > -1) {
      return name.slice(name.lastIndexOf('/') + 1);
    } else {
      return name;
    }
  }

  function listToString(list, separator) {
    let strs = '';
    separator = separator || ',';
    for (let i in list) {
      if (undefined !== list[i].src && list[i].src.indexOf('blob:') !== 0) {
        strs += list[i].src.replace(baseUrl, '') + separator;
      }
    }
    return strs != '' ? strs.substr(0, strs.length - 1) : '';
  }
</script>

<style scoped lang="scss"></style>
